Author: Daniel Jackson
Date: 18:37:51 06/14/04
Go up one level in this thread
On June 14, 2004 at 20:42:45, Anthony Cozzie wrote: >On June 14, 2004 at 18:11:17, Derek Paquette wrote: > >>On June 14, 2004 at 15:38:12, Daniel Jackson wrote: >> >>>With todays top hardware/software, can the winning move e5!! be found? >>> >>>[D]r2qrb1k/1p1b2p1/p2ppn1p/8/3NP3/1BN5/PPP3QP/1K3RR1 w - - 0 1 >>> >>>Daniel >> >> >>I think that these position tests are absolutely useless, >>an IM can draw a program, so who cares if it can find 'specific' moves >> >>if it doesn't have a 'game plan' and can only draw, >> >>whats the difference? > >Actually I'm pretty happy with this result. This makes at least 5 of the 11 >nolot positions that Zappa can solve in reasonable (a few hours) time. Of >course, I am a long way from it playing the move over the board at tournament >time control! > >1. Nc3-e2 e6-e5 2. Nd4-f5 g7-g5 3. Bb3-f7 Bd7-e6 4. Bf7xe8 Qd8xe8 5. h2-h4 g5-g4 >6. Nf5xh6 Bf8xh6 7. Rf1xf6 Bh6-g7 8. Rf6-f1 Qe8-a4 9. Ne2-c3 > = (1.87) Depth: 17/38 00:58:56.78 2666999kN >1. e4-e5 d6xe5 2. Nc3-e4 Nf6-h5 3. Qg2-g6 Nh5-f4 4. Rf1xf4 e5xf4 5. Nd4-f3 >Qd8-b6 6. Rg1-g5 Qb6-d8 7. Nf3-e5 Qd8-e7 8. Ne5-f7 Kh8-g8 9. Ne4-f6 Qe7xf6 10. >Nf7xh6 Kg8-h8 11. Nh6-f7 Qf6xf7 12. Qg6xf7 > = (2.28) Depth: 17/34 01:16:27.50 3451482kN > >Positions like these show that (IMO) more depth is *always* better. Maybe not a >lot better, but Zappa is still finding new tactics at 17 ply. > >anthony Thanks for posting your result! Good Stuff! I know one program that could solve this position quickly on an old P-75, but it was a unique case and not indictive of overall playing strength. The program was CM3000 by Dave Kittinger. Kittenger' programs have been known to play sacrifices without always seeing all possible results. It would refuse some sacrifices as well when many very strong programs of today would snap them up! An example is a well known trogan sac, with the Bishop on g5 and if h6 then h4!? and the program would not risk taking the Bishop opening the h-file, at least not in what appeared to be risky positions. In your case it appears Zappa is searching more thoroughly:) Daniel
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